Space

The moment a galactic light went out

Habitable zone redefined – and we're barely in it ourselves

NASA launches next-generation tracking and comms satellite

Old star may still be making planets

Ridges show evidence of Martian water

Iran sends monkey to space

Video: NASA resurrects mighty F-1 engine

NGC 411: The open cluster of the Small Magellanic Cloud

The thawing "dry ice" of Mars